hostapd/main.c

   1 /*
   2  * hostapd / main()
   3  * Copyright (c) 2002-2011, Jouni Malinen <j@w1.fi>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  */
  14
  15 #include "utils/includes.h"
  16 #ifndef CONFIG_NATIVE_WINDOWS
  17 #include <syslog.h>
  18 #endif /* CONFIG_NATIVE_WINDOWS */
  19
  20 #include "utils/common.h"
  21 #include "utils/eloop.h"
  22 #include "crypto/random.h"
  23 #include "crypto/tls.h"
  24 #include "common/version.h"
  25 #include "drivers/driver.h"
  26 #include "eap_server/eap.h"
  27 #include "eap_server/tncs.h"
  28 #include "ap/hostapd.h"
  29 #include "ap/ap_config.h"
  30 #include "config_file.h"
  31 #include "eap_register.h"
  32 #include "dump_state.h"
  33 #include "ctrl_iface.h"
  34
  35
  36 extern int wpa_debug_level;
  37 extern int wpa_debug_show_keys;
  38 extern int wpa_debug_timestamp;
  39
  40 extern struct wpa_driver_ops *wpa_drivers[];
  41
  42
  43 struct hapd_global {
  44         void **drv_priv;
  45         size_t drv_count;
  46 };
  47
  48 static struct hapd_global global;
  49
  50
  51 struct hapd_interfaces {
  52         size_t count;
  53         struct hostapd_iface **iface;
  54 };
  55
  56
  57 static int hostapd_for_each_interface(struct hapd_interfaces *interfaces,
  58                                       int (*cb)(struct hostapd_iface *iface,
  59                                                 void *ctx), void *ctx)
  60 {
  61         size_t i;
  62         int ret;
  63
  64         for (i = 0; i < interfaces->count; i++) {
  65                 ret = cb(interfaces->iface[i], ctx);
  66                 if (ret)
  67                         return ret;
  68         }
  69
  70         return 0;
  71 }
  72
  73
  74 #ifndef CONFIG_NO_HOSTAPD_LOGGER
  75 static void hostapd_logger_cb(void *ctx, const u8 *addr, unsigned int module,
  76                               int level, const char *txt, size_t len)
  77 {
  78         struct hostapd_data *hapd = ctx;
  79         char *format, *module_str;
  80         int maxlen;
  81         int conf_syslog_level, conf_stdout_level;
  82         unsigned int conf_syslog, conf_stdout;
  83
  84         maxlen = len + 100;
  85         format = os_malloc(maxlen);
  86         if (!format)
  87                 return;
  88
  89         if (hapd && hapd->conf) {
  90                 conf_syslog_level = hapd->conf->logger_syslog_level;
  91                 conf_stdout_level = hapd->conf->logger_stdout_level;
  92                 conf_syslog = hapd->conf->logger_syslog;
  93                 conf_stdout = hapd->conf->logger_stdout;
  94         } else {
  95                 conf_syslog_level = conf_stdout_level = 0;
  96                 conf_syslog = conf_stdout = (unsigned int) -1;
  97         }
  98
  99         switch (module) {
 100         case HOSTAPD_MODULE_IEEE80211:
 101                 module_str = "IEEE 802.11";
 102                 break;
 103         case HOSTAPD_MODULE_IEEE8021X:
 104                 module_str = "IEEE 802.1X";
 105                 break;
 106         case HOSTAPD_MODULE_RADIUS:
 107                 module_str = "RADIUS";
 108                 break;
 109         case HOSTAPD_MODULE_WPA:
 110                 module_str = "WPA";
 111                 break;
 112         case HOSTAPD_MODULE_DRIVER:
 113                 module_str = "DRIVER";
 114                 break;
 115         case HOSTAPD_MODULE_IAPP:
 116                 module_str = "IAPP";
 117                 break;
 118         case HOSTAPD_MODULE_MLME:
 119                 module_str = "MLME";
 120                 break;
 121         default:
 122                 module_str = NULL;
 123                 break;
 124         }
 125
 126         if (hapd && hapd->conf && addr)
 127                 os_snprintf(format, maxlen, "%s: STA " MACSTR "%s%s: %s",
 128                             hapd->conf->iface, MAC2STR(addr),
 129                             module_str ? " " : "", module_str, txt);
 130         else if (hapd && hapd->conf)
 131                 os_snprintf(format, maxlen, "%s:%s%s %s",
 132                             hapd->conf->iface, module_str ? " " : "",
 133                             module_str, txt);
 134         else if (addr)
 135                 os_snprintf(format, maxlen, "STA " MACSTR "%s%s: %s",
 136                             MAC2STR(addr), module_str ? " " : "",
 137                             module_str, txt);
 138         else
 139                 os_snprintf(format, maxlen, "%s%s%s",
 140                             module_str, module_str ? ": " : "", txt);
 141
 142         if ((conf_stdout & module) && level >= conf_stdout_level) {
 143                 wpa_debug_print_timestamp();
 144                 printf("%s\n", format);
 145         }
 146
 147 #ifndef CONFIG_NATIVE_WINDOWS
 148         if ((conf_syslog & module) && level >= conf_syslog_level) {
 149                 int priority;
 150                 switch (level) {
 151                 case HOSTAPD_LEVEL_DEBUG_VERBOSE:
 152                 case HOSTAPD_LEVEL_DEBUG:
 153                         priority = LOG_DEBUG;
 154                         break;
 155                 case HOSTAPD_LEVEL_INFO:
 156                         priority = LOG_INFO;
 157                         break;
 158                 case HOSTAPD_LEVEL_NOTICE:
 159                         priority = LOG_NOTICE;
 160                         break;
 161                 case HOSTAPD_LEVEL_WARNING:
 162                         priority = LOG_WARNING;
 163                         break;
 164                 default:
 165                         priority = LOG_INFO;
 166                         break;
 167                 }
 168                 syslog(priority, "%s", format);
 169         }
 170 #endif /* CONFIG_NATIVE_WINDOWS */
 171
 172         os_free(format);
 173 }
 174 #endif /* CONFIG_NO_HOSTAPD_LOGGER */
 175
 176
 177 /**
 178  * hostapd_init - Allocate and initialize per-interface data
 179  * @config_file: Path to the configuration file
 180  * Returns: Pointer to the allocated interface data or %NULL on failure
 181  *
 182  * This function is used to allocate main data structures for per-interface
 183  * data. The allocated data buffer will be freed by calling
 184  * hostapd_cleanup_iface().
 185  */
 186 static struct hostapd_iface * hostapd_init(const char *config_file)
 187 {
 188         struct hostapd_iface *hapd_iface = NULL;
 189         struct hostapd_config *conf = NULL;
 190         struct hostapd_data *hapd;
 191         size_t i;
 192
 193         hapd_iface = os_zalloc(sizeof(*hapd_iface));
 194         if (hapd_iface == NULL)
 195                 goto fail;
 196
 197         hapd_iface->reload_config = hostapd_reload_config;
 198         hapd_iface->config_read_cb = hostapd_config_read;
 199         hapd_iface->config_fname = os_strdup(config_file);
 200         if (hapd_iface->config_fname == NULL)
 201                 goto fail;
 202         hapd_iface->ctrl_iface_init = hostapd_ctrl_iface_init;
 203         hapd_iface->ctrl_iface_deinit = hostapd_ctrl_iface_deinit;
 204         hapd_iface->for_each_interface = hostapd_for_each_interface;
 205
 206         conf = hostapd_config_read(hapd_iface->config_fname);
 207         if (conf == NULL)
 208                 goto fail;
 209         hapd_iface->conf = conf;
 210
 211         hapd_iface->num_bss = conf->num_bss;
 212         hapd_iface->bss = os_zalloc(conf->num_bss *
 213                                     sizeof(struct hostapd_data *));
 214         if (hapd_iface->bss == NULL)
 215                 goto fail;
 216
 217         for (i = 0; i < conf->num_bss; i++) {
 218                 hapd = hapd_iface->bss[i] =
 219                         hostapd_alloc_bss_data(hapd_iface, conf,
 220                                                &conf->bss[i]);
 221                 if (hapd == NULL)
 222                         goto fail;
 223                 hapd->msg_ctx = hapd;
 224         }
 225
 226         return hapd_iface;
 227
 228 fail:
 229         if (conf)
 230                 hostapd_config_free(conf);
 231         if (hapd_iface) {
 232                 os_free(hapd_iface->config_fname);
 233                 os_free(hapd_iface->bss);
 234                 os_free(hapd_iface);
 235         }
 236         return NULL;
 237 }
 238
 239
 240 static int hostapd_driver_init(struct hostapd_iface *iface)
 241 {
 242         struct wpa_init_params params;
 243         size_t i;
 244         struct hostapd_data *hapd = iface->bss[0];
 245         struct hostapd_bss_config *conf = hapd->conf;
 246         u8 *b = conf->bssid;
 247         struct wpa_driver_capa capa;
 248
 249         if (hapd->driver == NULL || hapd->driver->hapd_init == NULL) {
 250                 wpa_printf(MSG_ERROR, "No hostapd driver wrapper available");
 251                 return -1;
 252         }
 253
 254         /* Initialize the driver interface */
 255         if (!(b[0] | b[1] | b[2] | b[3] | b[4] | b[5]))
 256                 b = NULL;
 257
 258         os_memset(&params, 0, sizeof(params));
 259         for (i = 0; wpa_drivers[i]; i++) {
 260                 if (wpa_drivers[i] != hapd->driver)
 261                         continue;
 262
 263                 if (global.drv_priv[i] == NULL &&
 264                     wpa_drivers[i]->global_init) {
 265                         global.drv_priv[i] = wpa_drivers[i]->global_init();
 266                         if (global.drv_priv[i] == NULL) {
 267                                 wpa_printf(MSG_ERROR, "Failed to initialize "
 268                                            "driver '%s'",
 269                                            wpa_drivers[i]->name);
 270                                 return -1;
 271                         }
 272                 }
 273
 274                 params.global_priv = global.drv_priv[i];
 275                 break;
 276         }
 277         params.bssid = b;
 278         params.ifname = hapd->conf->iface;
 279         params.ssid = (const u8 *) hapd->conf->ssid.ssid;
 280         params.ssid_len = hapd->conf->ssid.ssid_len;
 281         params.test_socket = hapd->conf->test_socket;
 282         params.use_pae_group_addr = hapd->conf->use_pae_group_addr;
 283
 284         params.num_bridge = hapd->iface->num_bss;
 285         params.bridge = os_zalloc(hapd->iface->num_bss * sizeof(char *));
 286         if (params.bridge == NULL)
 287                 return -1;
 288         for (i = 0; i < hapd->iface->num_bss; i++) {
 289                 struct hostapd_data *bss = hapd->iface->bss[i];
 290                 if (bss->conf->bridge[0])
 291                         params.bridge[i] = bss->conf->bridge;
 292         }
 293
 294         params.own_addr = hapd->own_addr;
 295
 296         hapd->drv_priv = hapd->driver->hapd_init(hapd, &params);
 297         os_free(params.bridge);
 298         if (hapd->drv_priv == NULL) {
 299                 wpa_printf(MSG_ERROR, "%s driver initialization failed.",
 300                            hapd->driver->name);
 301                 hapd->driver = NULL;
 302                 return -1;
 303         }
 304
 305         if (hapd->driver->get_capa &&
 306             hapd->driver->get_capa(hapd->drv_priv, &capa) == 0) {
 307                 iface->drv_flags = capa.flags;
 308                 iface->probe_resp_offloads = capa.probe_resp_offloads;
 309         }
 310
 311         return 0;
 312 }
 313
 314
 315 static void hostapd_interface_deinit_free(struct hostapd_iface *iface)
 316 {
 317         const struct wpa_driver_ops *driver;
 318         void *drv_priv;
 319         if (iface == NULL)
 320                 return;
 321         driver = iface->bss[0]->driver;
 322         drv_priv = iface->bss[0]->drv_priv;
 323         hostapd_interface_deinit(iface);
 324         if (driver && driver->hapd_deinit)
 325                 driver->hapd_deinit(drv_priv);
 326         hostapd_interface_free(iface);
 327 }
 328
 329
 330 static struct hostapd_iface *
 331 hostapd_interface_init(struct hapd_interfaces *interfaces,
 332                        const char *config_fname, int debug)
 333 {
 334         struct hostapd_iface *iface;
 335         int k;
 336
 337         wpa_printf(MSG_ERROR, "Configuration file: %s", config_fname);
 338         iface = hostapd_init(config_fname);
 339         if (!iface)
 340                 return NULL;
 341         iface->interfaces = interfaces;
 342
 343         for (k = 0; k < debug; k++) {
 344                 if (iface->bss[0]->conf->logger_stdout_level > 0)
 345                         iface->bss[0]->conf->logger_stdout_level--;
 346         }
 347
 348         if (hostapd_driver_init(iface) ||
 349             hostapd_setup_interface(iface)) {
 350                 hostapd_interface_deinit_free(iface);
 351                 return NULL;
 352         }
 353
 354         return iface;
 355 }
 356
 357
 358 /**
 359  * handle_term - SIGINT and SIGTERM handler to terminate hostapd process
 360  */
 361 static void handle_term(int sig, void *signal_ctx)
 362 {
 363         wpa_printf(MSG_DEBUG, "Signal %d received - terminating", sig);
 364         eloop_terminate();
 365 }
 366
 367
 368 #ifndef CONFIG_NATIVE_WINDOWS
 369
 370 static int handle_reload_iface(struct hostapd_iface *iface, void *ctx)
 371 {
 372         if (hostapd_reload_config(iface) < 0) {
 373                 wpa_printf(MSG_WARNING, "Failed to read new configuration "
 374                            "file - continuing with old.");
 375         }
 376         return 0;
 377 }
 378
 379
 380 /**
 381  * handle_reload - SIGHUP handler to reload configuration
 382  */
 383 static void handle_reload(int sig, void *signal_ctx)
 384 {
 385         struct hapd_interfaces *interfaces = signal_ctx;
 386         wpa_printf(MSG_DEBUG, "Signal %d received - reloading configuration",
 387                    sig);
 388         hostapd_for_each_interface(interfaces, handle_reload_iface, NULL);
 389 }
 390
 391
 392 static void handle_dump_state(int sig, void *signal_ctx)
 393 {
 394 #ifdef HOSTAPD_DUMP_STATE
 395         struct hapd_interfaces *interfaces = signal_ctx;
 396         hostapd_for_each_interface(interfaces, handle_dump_state_iface, NULL);
 397 #endif /* HOSTAPD_DUMP_STATE */
 398 }
 399 #endif /* CONFIG_NATIVE_WINDOWS */
 400
 401
 402 static int hostapd_global_init(struct hapd_interfaces *interfaces,
 403                                const char *entropy_file)
 404 {
 405         int i;
 406
 407         os_memset(&global, 0, sizeof(global));
 408
 409         hostapd_logger_register_cb(hostapd_logger_cb);
 410
 411         if (eap_server_register_methods()) {
 412                 wpa_printf(MSG_ERROR, "Failed to register EAP methods");
 413                 return -1;
 414         }
 415
 416         if (eloop_init()) {
 417                 wpa_printf(MSG_ERROR, "Failed to initialize event loop");
 418                 return -1;
 419         }
 420
 421         random_init(entropy_file);
 422
 423 #ifndef CONFIG_NATIVE_WINDOWS
 424         eloop_register_signal(SIGHUP, handle_reload, interfaces);
 425         eloop_register_signal(SIGUSR1, handle_dump_state, interfaces);
 426 #endif /* CONFIG_NATIVE_WINDOWS */
 427         eloop_register_signal_terminate(handle_term, interfaces);
 428
 429 #ifndef CONFIG_NATIVE_WINDOWS
 430         openlog("hostapd", 0, LOG_DAEMON);
 431 #endif /* CONFIG_NATIVE_WINDOWS */
 432
 433         for (i = 0; wpa_drivers[i]; i++)
 434                 global.drv_count++;
 435         if (global.drv_count == 0) {
 436                 wpa_printf(MSG_ERROR, "No drivers enabled");
 437                 return -1;
 438         }
 439         global.drv_priv = os_zalloc(global.drv_count * sizeof(void *));
 440         if (global.drv_priv == NULL)
 441                 return -1;
 442
 443         return 0;
 444 }
 445
 446
 447 static void hostapd_global_deinit(const char *pid_file)
 448 {
 449         int i;
 450
 451         for (i = 0; wpa_drivers[i] && global.drv_priv; i++) {
 452                 if (!global.drv_priv[i])
 453                         continue;
 454                 wpa_drivers[i]->global_deinit(global.drv_priv[i]);
 455         }
 456         os_free(global.drv_priv);
 457         global.drv_priv = NULL;
 458
 459 #ifdef EAP_SERVER_TNC
 460         tncs_global_deinit();
 461 #endif /* EAP_SERVER_TNC */
 462
 463         random_deinit();
 464
 465         eloop_destroy();
 466
 467 #ifndef CONFIG_NATIVE_WINDOWS
 468         closelog();
 469 #endif /* CONFIG_NATIVE_WINDOWS */
 470
 471         eap_server_unregister_methods();
 472
 473         os_daemonize_terminate(pid_file);
 474 }
 475
 476
 477 static int hostapd_global_run(struct hapd_interfaces *ifaces, int daemonize,
 478                               const char *pid_file)
 479 {
 480 #ifdef EAP_SERVER_TNC
 481         int tnc = 0;
 482         size_t i, k;
 483
 484         for (i = 0; !tnc && i < ifaces->count; i++) {
 485                 for (k = 0; k < ifaces->iface[i]->num_bss; k++) {
 486                         if (ifaces->iface[i]->bss[0]->conf->tnc) {
 487                                 tnc++;
 488                                 break;
 489                         }
 490                 }
 491         }
 492
 493         if (tnc && tncs_global_init() < 0) {
 494                 wpa_printf(MSG_ERROR, "Failed to initialize TNCS");
 495                 return -1;
 496         }
 497 #endif /* EAP_SERVER_TNC */
 498
 499         if (daemonize && os_daemonize(pid_file)) {
 500                 perror("daemon");
 501                 return -1;
 502         }
 503
 504         eloop_run();
 505
 506         return 0;
 507 }
 508
 509
 510 static void show_version(void)
 511 {
 512         fprintf(stderr,
 513                 "hostapd v" VERSION_STR "\n"
 514                 "User space daemon for IEEE 802.11 AP management,\n"
 515                 "IEEE 802.1X/WPA/WPA2/EAP/RADIUS Authenticator\n"
 516                 "Copyright (c) 2002-2011, Jouni Malinen <j@w1.fi> "
 517                 "and contributors\n");
 518 }
 519
 520
 521 static void usage(void)
 522 {
 523         show_version();
 524         fprintf(stderr,
 525                 "\n"
 526                 "usage: hostapd [-hdBKtv] [-P <PID file>] [-e <entropy file>] "
 527                 "<configuration file(s)>\n"
 528                 "\n"
 529                 "options:\n"
 530                 "   -h   show this usage\n"
 531                 "   -d   show more debug messages (-dd for even more)\n"
 532                 "   -B   run daemon in the background\n"
 533                 "   -e   entropy file\n"
 534                 "   -P   PID file\n"
 535                 "   -K   include key data in debug messages\n"
 536 #ifdef CONFIG_DEBUG_FILE
 537                 "   -f   log output to debug file instead of stdout\n"
 538 #endif /* CONFIG_DEBUG_FILE */
 539                 "   -t   include timestamps in some debug messages\n"
 540                 "   -v   show hostapd version\n");
 541
 542         exit(1);
 543 }
 544
 545
 546 static const char * hostapd_msg_ifname_cb(void *ctx)
 547 {
 548         struct hostapd_data *hapd = ctx;
 549         if (hapd && hapd->iconf && hapd->iconf->bss)
 550                 return hapd->iconf->bss->iface;
 551         return NULL;
 552 }
 553
 554
 555 int main(int argc, char *argv[])
 556 {
 557         struct hapd_interfaces interfaces;
 558         int ret = 1;
 559         size_t i;
 560         int c, debug = 0, daemonize = 0;
 561         char *pid_file = NULL;
 562         const char *log_file = NULL;
 563         const char *entropy_file = NULL;
 564
 565         if (os_program_init())
 566                 return -1;
 567
 568         for (;;) {
 569                 c = getopt(argc, argv, "Bde:f:hKP:tv");
 570                 if (c < 0)
 571                         break;
 572                 switch (c) {
 573                 case 'h':
 574                         usage();
 575                         break;
 576                 case 'd':
 577                         debug++;
 578                         if (wpa_debug_level > 0)
 579                                 wpa_debug_level--;
 580                         break;
 581                 case 'B':
 582                         daemonize++;
 583                         break;
 584                 case 'e':
 585                         entropy_file = optarg;
 586                         break;
 587                 case 'f':
 588                         log_file = optarg;
 589                         break;
 590                 case 'K':
 591                         wpa_debug_show_keys++;
 592                         break;
 593                 case 'P':
 594                         os_free(pid_file);
 595                         pid_file = os_rel2abs_path(optarg);
 596                         break;
 597                 case 't':
 598                         wpa_debug_timestamp++;
 599                         break;
 600                 case 'v':
 601                         show_version();
 602                         exit(1);
 603                         break;
 604
 605                 default:
 606                         usage();
 607                         break;
 608                 }
 609         }
 610
 611         if (optind == argc)
 612                 usage();
 613
 614         wpa_msg_register_ifname_cb(hostapd_msg_ifname_cb);
 615
 616         if (log_file)
 617                 wpa_debug_open_file(log_file);
 618
 619         interfaces.count = argc - optind;
 620         interfaces.iface = os_zalloc(interfaces.count *
 621                                      sizeof(struct hostapd_iface *));
 622         if (interfaces.iface == NULL) {
 623                 wpa_printf(MSG_ERROR, "malloc failed");
 624                 return -1;
 625         }
 626
 627         if (hostapd_global_init(&interfaces, entropy_file))
 628                 return -1;
 629
 630         /* Initialize interfaces */
 631         for (i = 0; i < interfaces.count; i++) {
 632                 interfaces.iface[i] = hostapd_interface_init(&interfaces,
 633                                                              argv[optind + i],
 634                                                              debug);
 635                 if (!interfaces.iface[i])
 636                         goto out;
 637         }
 638
 639         if (hostapd_global_run(&interfaces, daemonize, pid_file))
 640                 goto out;
 641
 642         ret = 0;
 643
 644  out:
 645         /* Deinitialize all interfaces */
 646         for (i = 0; i < interfaces.count; i++)
 647                 hostapd_interface_deinit_free(interfaces.iface[i]);
 648         os_free(interfaces.iface);
 649
 650         hostapd_global_deinit(pid_file);
 651         os_free(pid_file);
 652
 653         if (log_file)
 654                 wpa_debug_close_file();
 655
 656         os_program_deinit();
 657
 658         return ret;
 659 }